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Geophysical targeting of Fe-oxide Cu-(Au) deposits west of Kiruna, Sweden
Geological Institute.ORCID iD: 0000-0001-7251-6514
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
2007 (English)In: Journal of Applied Geophysics, ISSN 0926-9851, E-ISSN 1879-1859, Vol. 61, no 2, p. 92-101Article in journal (Refereed) Published
Abstract [en]

Ore deposits are frequently associated with various types of rock alteration that may affect the physical properties of rocks, and result in a characteristic signature of the deposits. The present work focuses on the use of geophysical data in targeting areas hosting Fe-oxide Cu-Au (IOCG) deposits west of the Kiruna mining district, northern Sweden. It is noted that IOCG deposits in different areas worldwide (e.g., Australia, Canada) are preferentially located in proximity to faults associated with deformation zones of regional relevance, and that the deposits are hosted in areas affected by potassic to sodic alteration. This study shows that at a semi-regional scale IOCG deposits occur within areas of high positive gravity anomalies, high values of estimated potassium content and high K/Th ratios, which is an expression of potassic alteration. High magnetic anomalies are associated with magnetite occurrences, while low linear magnetic anomalies mark fault/shear zones, in proximity of which the majority of the IOCG deposits occur.

Place, publisher, year, edition, pages
2007. Vol. 61, no 2, p. 92-101
National Category
Geology Geophysics
Research subject
Ore Geology; Applied Geophysics
Identifiers
URN: urn:nbn:se:ltu:diva-5587DOI: 10.1016/j.jappgeo.2006.05.002ISI: 000246503600002Scopus ID: 2-s2.0-33845884098Local ID: 3b870f80-d479-11db-8550-000ea68e967bOAI: oai:DiVA.org:ltu-5587DiVA, id: diva2:978461
Note

Validerad; 2007; 20070317 (ysko)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Berggren, RobertElming, Sten-åke

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  • apa
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  • de-DE
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